He said AT&T promised nothing to his group during that time period and noted that the NHFA has regularly submitted comments on issues in front of the Federal Communications Commission.

The filing also cites the more familiar arguments in favor of the merger from proponents: that it will speed the deployment of 4G wireless broadband to more than 97 percent of the population and increase the membership of the Communications Workers of America. AT&T is the only unionized major wireless carrier.

Sanchez noted Hispanics are leading adopters of mobile technology, with two-thirds of the overall U.S. Hispanic population currently making use of the mobile Web. He said boosting union membership is also a priority of his organization.